Lewellyn
Lewellyn was last recorded in 1962, when 5 babies were given it; 339 Americans have been recorded with it between 1912 and 1962 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Lewellyn by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Lewellyn?
Unranked in 2025
Its last boys’ rank on record is #4,395, in 1962; SSA lists a name only in years with 5 or more births.
22 babies in 1929, the peak
Lewellyn peaked in 1929, when 22 babies were given it (17 boys, #1,899 among boys’ names). It was not recorded in 2025.
Births by sex.
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 1962 | 5 | #4,395 | 2.4 |
| 1961 | 5 | #4,410 | 2.4 |
| 1958 | 7 | #3,447 | 3.3 |
| 1956 | 9 | #2,893 | 4.3 |
| 1954 | 5 | #4,140 | 2.5 |
| 1952 | 7 | #3,259 | 3.6 |
| 1951 | 5 | #4,030 | 2.7 |
| 1949 | 6 | #3,544 | 3.4 |
| 1948 | 6 | #3,523 | 3.4 |
| 1945 | 6 | #3,190 | 4.5 |
Every recorded year (39)
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 1944 | 14 | #1,934 | 10.3 |
| 1943 | 5 | #3,831 | 3.5 |
| 1940 | 5 | #3,735 | 4.3 |
| 1939 | 13 | #2,013 | 11.7 |
| 1937 | 5 | #3,823 | 4.7 |
| 1936 | 6 | #3,378 | 5.8 |
| 1935 | 8 | #2,844 | 7.7 |
| 1934 | 8 | #2,856 | 7.7 |
| 1933 | 7 | #3,164 | 7.1 |
| 1931 | 7 | #3,278 | 6.7 |
| 1930 | 12 | #2,384 | 10.9 |
| 1929 | 17 | #1,899 | 15.8 |
| 1928 | 9 | #2,970 | 8.1 |
| 1927 | 5 | #4,533 | 4.4 |
| 1926 | 11 | #2,660 | 9.9 |
| 1925 | 10 | #2,856 | 9.0 |
| 1924 | 6 | #4,141 | 5.3 |
| 1923 | 7 | #3,672 | 6.4 |
| 1922 | 8 | #3,416 | 7.4 |
| 1921 | 15 | #2,219 | 13.6 |
| 1920 | 9 | #3,095 | 8.5 |
| 1919 | 9 | #3,020 | 9.2 |
| 1918 | 8 | #3,261 | 7.9 |
| 1917 | 7 | #3,420 | 7.6 |
| 1916 | 10 | #2,652 | 11.2 |
| 1915 | 5 | #4,146 | 5.9 |
| 1914 | 5 | #3,542 | 7.6 |
| 1913 | 8 | #2,183 | 15.6 |
| 1912 | 6 | #2,442 | 14.0 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Lewellyn a boy’s or a girl’s name?
Of the 339 Americans recorded as Lewellyn, 10% are girls and 90% boys.
Years with fewer than 20 babies given the name are left blank.
Girls and boys named Lewellyn: the SSA national file counts each sex separately.
How many people are named Lewellyn, and how old are they?
An estimated 64 Americans named Lewellyn and born in the U.S. are alive in 2026, too few to state an age range. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 198 people named Lewellyn (54 women and girls, 144 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 93 born in the U.S. The Census count is 2.1 times that prediction. Possible reasons: the Census counts people born abroad, whom SSA’s files leave out, and it records the name people give, which SSA may have recorded under another spelling or as part of a compound name.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
How common is the spelling Lewellyn?
Lewellyn is a less common spelling of Llewellyn: SSA has recorded 339 Lewellyn and 3,755 Llewellyn since 1880.
Of these 3 names spelled alike, given to 4,282 babies since 1880, Lewellyn is the second most given (7.9% of them). In 2025 none of their 44 babies recorded by SSA was a Lewellyn (SSA lists a name only with 5 or more babies of one sex).
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Lewellyn
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Lewellyn and names like it
- Compare Lewellyn and LlewellynBirths, ranks, peak and the living estimate side by side.
- The most given names of the 1920sLewellyn peaked in 1929.
- The top names of 1929The year the most babies were named Lewellyn.
- Names starting with LMost given first.